package org.leon.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("begin to check session");
        Object username = request.getSession().getAttribute("username");
        if (username != null) {
            return true;
        } else {
            response.sendRedirect(request.getContextPath() + "/login/index");
            return false;
        }

    }
}
